Wednesday, February 27, 2008

Form machining and Tooth-generation Processes

Form machining –
In this type of machining, the cutter is of the form of the tooth space to be produced and as this type of cutter cuts, it transfers its tooth form to the job. Some examples of this process are :

1. Milling of spur/helical gears on the milling machine;
2. Form grinding of gear tooth on Overcut or similar type of gear grinding machines, and
3. Cutting of hypoid gear wheel of non-generated type.



Tooth-generation Processes –
For this type, the involute form is produced by generation. The form may be generated in various ways which are described later in individual process descriptions. Some of the generation processes are :
(1) Milling
(2) Hobbing
(3) Shaping, and
(4) Rack planning, etc.

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